当可膨胀的砂筛安装好后,筛管的外部和岩石之间的缝隙能够开始从零向上变化。钻井后井眼的状态、后来的测井或是完井操作、筛管的特性和膨胀过程等对这个缝隙都有影响。描述了关于长期的和短期完井中割缝冲击力的模拟实验。测量封闭井眼的实验表明,与裸眼相比,筛管的存在能提高井眼的稳定性。当环形割缝存在时,提高的幅度会降低。岩石变形模拟支持这一结论,它指出了对于一个径向刚度很低的筛管,有一个非常小的缝隙或是没有缝隙都是比较合适的,而刚度高的筛管能够承受稍微大一些的缝隙,可达几毫米。在这两种情况下,都会发生岩石屈服变形。割缝再增大,超过了允许的屈服极限,岩石就会遭到破坏,从而导致了点载荷和腐蚀问题。这个实验采用一种新型的双稳砂型筛管。虽然这种筛管是为了尽可能和井壁相配合而设计的,并且有非常低的扩散力,但是其结论同样适用于其他类型的筛管。 When the inflatable sand screen is installed, the gap between the outside of the screen and the rock can begin to change upward from zero. The status of the wellbore after drilling, subsequent logging or completion operations, screen characteristics and expansion process have an impact on this gap. Describes a simulation experiment on the impact of kerfing in long-term and short-term completions. Experiments that measure closed boreholes have shown that the presence of screen tubes improves borehole stability compared to the naked eye. When the annular kerf exists, the amplitude of the increase will decrease. The rock deformation simulation supports this conclusion by pointing out that for a screen with very low radial stiffness, it is appropriate to have a very small gap or no gap, while a stiff screen can withstand slightly larger Slit, up to a few millimeters. In both cases, rock yield deformation occurs. The kerf increases again, beyond the allowable yield limit, and the rock is destroyed, resulting in point loads and corrosion problems. This experiment uses a new bistable sand screen. Although this screen is designed to be as close as possible to the wellbore and has a very low spreading force, the conclusion is equally valid for other types of screens.